The concept of abstract expressionism was introduced by artist Jackson Pollock, who became famous for his innovative drip paintings. This movement emphasized spontaneous, automatic, or subconscious creation, allowing artists to express emotions and ideas in a non-representational way. Pollock's technique transformed the art landscape, shifting the focus from traditional forms and subjects to an exploration of the physical act of painting itself. His approach encouraged artists to experiment with materials and methods, leading to a new visual language that emphasized individual expression and marked a significant departure from previous artistic conventions.